 /*******************************************************************************
  * Copyright (c) 2000, 2005 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.update.core;

 import org.eclipse.core.runtime.*;

 /**
  * Plug-in entry defines a packaging reference from a feature to a plug-in.
  * It indicates that the referenced plug-in is to be considered as
  * part of the feature. Note, that this does not necessarily indicate
  * that the plug-in files are packaged together with any other
  * feature files. The actual packaging details are determined by the
  * feature content provider for the feature.
  * <p>
  * Clients may implement this interface. However, in most cases clients should
  * directly instantiate or subclass the provided implementation of this
  * interface.
  * </p>
  * <p>
  * <b>Note:</b> This class/interface is part of an interim API that is still under development and expected to
  * change significantly before reaching stability. It is being made available at this early stage to solicit feedback
  * from pioneering adopters on the understanding that any code that uses this API will almost certainly be broken
  * (repeatedly) as the API evolves.
  * </p>
  * @see org.eclipse.update.core.PluginEntry
  * @see org.eclipse.update.core.FeatureContentProvider
  * @since 2.0
  */
 public interface IPlatformEnvironment extends IAdaptable {


     /**
      * Returns optional operating system specification.
      * A comma-separated list of os designators defined by the platform.
      * Indicates this entry should only be installed on one of the specified
      * os systems. If this attribute is not specified, or is <code>*</code>, the
      * entry can be installed on all systems (portable implementation). If the

      * This information is used as a hint by the installation and update
      * support.
      *
      * @return the operating system specification, or <code>null</code>.
      * @since 2.0
      */
     public String getOS();

     /**
      * Returns optional system architecture specification.
      * A comma-separated list of arch designators defined by the platform.
      * Indicates this entry should only be installed on one of the specified
      * systems. If this attribute is not specified, or is <code>*</code>, the
      * entry can be installed on all systems (portable implementation).
      *
      * This information is used as a hint by the installation and update
      * support.
      *
      * @return system architecture specification, or <code>null</code>.
      * @since 2.0
      */
     public String getWS();

     /**
      * Returns optional system architecture specification.
      * A comma-separated list of arch designators defined by the platform.
      * Indicates this entry should only be installed on one of the specified
      * systems. If this attribute is not specified, or is <code>*</code>, the
      * entry can be installed on all systems (portable implementation).
      *
      * This information is used as a hint by the installation and update
      * support.
      *
      * @return system architecture specification, or <code>null</code>.
      * @since 2.0
      */
     public String getOSArch();

     /**
      * Returns optional locale specification.
      * A comma-separated list of locale designators defined by Java.
      * Indicates this entry should only be installed on a system running
      * with a compatible locale (using Java locale-matching rules).
      * If this attribute is not specified, or is <code>*</code>, the entry can
      * be installed on all systems (language-neutral implementation).
      *
      * This information is used as a hint by the installation and update
      * support.
      *
      * @return the locale specification, or <code>null</code>.
      * @since 2.0
      */
     public String getNL();


 }

